51487349 has 12 divisors (see below), whose sum is σ = 53447460. Its totient is φ = 49593600.

The previous prime is 51487343. The next prime is 51487351. The reversal of 51487349 is 94378415.

It can be written as a sum of positive squares in 6 ways, for example, as 6838225 + 44649124 = 2615^2 + 6682^2 .

It is not a de Polignac number, because 51487349 - 2¹² = 51483253 is a prime.

It is a super-3 number, since 3×51487349³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51487343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183089 + ... + 183369.

It is an arithmetic number, because the mean of its divisors is an integer number (4453955).

Almost surely, 2^51487349 is an apocalyptic number.

It is an amenable number.

51487349 is a deficient number, since it is larger than the sum of its proper divisors (1960111).

51487349 is a wasteful number, since it uses less digits than its factorization.

51487349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 431 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 51487349 is about 7175.4685561293. The cubic root of 51487349 is about 372.0204757103.

The spelling of 51487349 in words is "fifty-one million, four hundred eighty-seven thousand, three hundred forty-nine".